[linux-2.6-block.git] / net / xfrm / xfrm_algo.c

/*
 * xfrm algorithm interface
 *
 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 */

#include <crypto/hash.h>
#include <crypto/skcipher.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/pfkeyv2.h>
#include <linux/crypto.h>
#include <linux/scatterlist.h>
#include <net/xfrm.h>
#if defined(CONFIG_INET_ESP) || defined(CONFIG_INET_ESP_MODULE) || defined(CONFIG_INET6_ESP) || defined(CONFIG_INET6_ESP_MODULE)
#include <net/esp.h>
#endif

/*
 * Algorithms supported by IPsec.  These entries contain properties which
 * are used in key negotiation and xfrm processing, and are used to verify
 * that instantiated crypto transforms have correct parameters for IPsec
 * purposes.
 */
static struct xfrm_algo_desc aead_list[] = {
{
	.name = "rfc4106(gcm(aes))",

	.uinfo = {
		.aead = {
			.geniv = "seqiv",
			.icv_truncbits = 64,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 256
	}
},
{
	.name = "rfc4106(gcm(aes))",

	.uinfo = {
		.aead = {
			.geniv = "seqiv",
			.icv_truncbits = 96,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 256
	}
},
{
	.name = "rfc4106(gcm(aes))",

	.uinfo = {
		.aead = {
			.geniv = "seqiv",
			.icv_truncbits = 128,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 256
	}
},
{
	.name = "rfc4309(ccm(aes))",

	.uinfo = {
		.aead = {
			.geniv = "seqiv",
			.icv_truncbits = 64,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 256
	}
},
{
	.name = "rfc4309(ccm(aes))",

	.uinfo = {
		.aead = {
			.geniv = "seqiv",
			.icv_truncbits = 96,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 256
	}
},
{
	.name = "rfc4309(ccm(aes))",

	.uinfo = {
		.aead = {
			.geniv = "seqiv",
			.icv_truncbits = 128,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 256
	}
},
{
	.name = "rfc4543(gcm(aes))",

	.uinfo = {
		.aead = {
			.geniv = "seqiv",
			.icv_truncbits = 128,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_NULL_AES_GMAC,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 256
	}
},
{
	.name = "rfc7539esp(chacha20,poly1305)",

	.uinfo = {
		.aead = {
			.geniv = "seqiv",
			.icv_truncbits = 128,
		}
	},

	.pfkey_supported = 0,
},
};

static struct xfrm_algo_desc aalg_list[] = {
{
	.name = "digest_null",

	.uinfo = {
		.auth = {
			.icv_truncbits = 0,
			.icv_fullbits = 0,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_AALG_NULL,
		.sadb_alg_ivlen = 0,
		.sadb_alg_minbits = 0,
		.sadb_alg_maxbits = 0
	}
},
{
	.name = "hmac(md5)",
	.compat = "md5",

	.uinfo = {
		.auth = {
			.icv_truncbits = 96,
			.icv_fullbits = 128,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_AALG_MD5HMAC,
		.sadb_alg_ivlen = 0,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 128
	}
},
{
	.name = "hmac(sha1)",
	.compat = "sha1",

	.uinfo = {
		.auth = {
			.icv_truncbits = 96,
			.icv_fullbits = 160,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_AALG_SHA1HMAC,
		.sadb_alg_ivlen = 0,
		.sadb_alg_minbits = 160,
		.sadb_alg_maxbits = 160
	}
},
{
	.name = "hmac(sha256)",
	.compat = "sha256",

	.uinfo = {
		.auth = {
			.icv_truncbits = 96,
			.icv_fullbits = 256,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_AALG_SHA2_256HMAC,
		.sadb_alg_ivlen = 0,
		.sadb_alg_minbits = 256,
		.sadb_alg_maxbits = 256
	}
},
{
	.name = "hmac(sha384)",

	.uinfo = {
		.auth = {
			.icv_truncbits = 192,
			.icv_fullbits = 384,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_AALG_SHA2_384HMAC,
		.sadb_alg_ivlen = 0,
		.sadb_alg_minbits = 384,
		.sadb_alg_maxbits = 384
	}
},
{
	.name = "hmac(sha512)",

	.uinfo = {
		.auth = {
			.icv_truncbits = 256,
			.icv_fullbits = 512,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_AALG_SHA2_512HMAC,
		.sadb_alg_ivlen = 0,
		.sadb_alg_minbits = 512,
		.sadb_alg_maxbits = 512
	}
},
{
	.name = "hmac(rmd160)",
	.compat = "rmd160",

	.uinfo = {
		.auth = {
			.icv_truncbits = 96,
			.icv_fullbits = 160,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_AALG_RIPEMD160HMAC,
		.sadb_alg_ivlen = 0,
		.sadb_alg_minbits = 160,
		.sadb_alg_maxbits = 160
	}
},
{
	.name = "xcbc(aes)",

	.uinfo = {
		.auth = {
			.icv_truncbits = 96,
			.icv_fullbits = 128,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC,
		.sadb_alg_ivlen = 0,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 128
	}
},
{
	/* rfc4494 */
	.name = "cmac(aes)",

	.uinfo = {
		.auth = {
			.icv_truncbits = 96,
			.icv_fullbits = 128,
		}
	},

	.pfkey_supported = 0,
},
};

static struct xfrm_algo_desc ealg_list[] = {
{
	.name = "ecb(cipher_null)",
	.compat = "cipher_null",

	.uinfo = {
		.encr = {
			.blockbits = 8,
			.defkeybits = 0,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id =	SADB_EALG_NULL,
		.sadb_alg_ivlen = 0,
		.sadb_alg_minbits = 0,
		.sadb_alg_maxbits = 0
	}
},
{
	.name = "cbc(des)",
	.compat = "des",

	.uinfo = {
		.encr = {
			.geniv = "echainiv",
			.blockbits = 64,
			.defkeybits = 64,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_EALG_DESCBC,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 64,
		.sadb_alg_maxbits = 64
	}
},
{
	.name = "cbc(des3_ede)",
	.compat = "des3_ede",

	.uinfo = {
		.encr = {
			.geniv = "echainiv",
			.blockbits = 64,
			.defkeybits = 192,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_EALG_3DESCBC,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 192,
		.sadb_alg_maxbits = 192
	}
},
{
	.name = "cbc(cast5)",
	.compat = "cast5",

	.uinfo = {
		.encr = {
			.geniv = "echainiv",
			.blockbits = 64,
			.defkeybits = 128,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_CASTCBC,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 40,
		.sadb_alg_maxbits = 128
	}
},
{
	.name = "cbc(blowfish)",
	.compat = "blowfish",

	.uinfo = {
		.encr = {
			.geniv = "echainiv",
			.blockbits = 64,
			.defkeybits = 128,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_BLOWFISHCBC,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 40,
		.sadb_alg_maxbits = 448
	}
},
{
	.name = "cbc(aes)",
	.compat = "aes",

	.uinfo = {
		.encr = {
			.geniv = "echainiv",
			.blockbits = 128,
			.defkeybits = 128,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_AESCBC,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 256
	}
},
{
	.name = "cbc(serpent)",
	.compat = "serpent",

	.uinfo = {
		.encr = {
			.geniv = "echainiv",
			.blockbits = 128,
			.defkeybits = 128,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_SERPENTCBC,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 256,
	}
},
{
	.name = "cbc(camellia)",
	.compat = "camellia",

	.uinfo = {
		.encr = {
			.geniv = "echainiv",
			.blockbits = 128,
			.defkeybits = 128,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_CAMELLIACBC,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 256
	}
},
{
	.name = "cbc(twofish)",
	.compat = "twofish",

	.uinfo = {
		.encr = {
			.geniv = "echainiv",
			.blockbits = 128,
			.defkeybits = 128,
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_TWOFISHCBC,
		.sadb_alg_ivlen = 8,
		.sadb_alg_minbits = 128,
		.sadb_alg_maxbits = 256
	}
},
{
	.name = "rfc3686(ctr(aes))",

	.uinfo = {
		.encr = {
			.geniv = "seqiv",
			.blockbits = 128,
			.defkeybits = 160, /* 128-bit key + 32-bit nonce */
		}
	},

	.pfkey_supported = 1,

	.desc = {
		.sadb_alg_id = SADB_X_EALG_AESCTR,
		.sadb_alg_ivlen	= 8,
		.sadb_alg_minbits = 160,
		.sadb_alg_maxbits = 288
	}
},
};

static struct xfrm_algo_desc calg_list[] = {
{
	.name = "deflate",
	.uinfo = {
		.comp = {
			.threshold = 90,
		}
	},
	.pfkey_supported = 1,
	.desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE }
},
{
	.name = "lzs",
	.uinfo = {
		.comp = {
			.threshold = 90,
		}
	},
	.pfkey_supported = 1,
	.desc = { .sadb_alg_id = SADB_X_CALG_LZS }
},
{
	.name = "lzjh",
	.uinfo = {
		.comp = {
			.threshold = 50,
		}
	},
	.pfkey_supported = 1,
	.desc = { .sadb_alg_id = SADB_X_CALG_LZJH }
},
};

static inline int aalg_entries(void)
{
	return ARRAY_SIZE(aalg_list);
}

static inline int ealg_entries(void)
{
	return ARRAY_SIZE(ealg_list);
}

static inline int calg_entries(void)
{
	return ARRAY_SIZE(calg_list);
}

struct xfrm_algo_list {
	struct xfrm_algo_desc *algs;
	int entries;
	u32 type;
	u32 mask;
};

static const struct xfrm_algo_list xfrm_aead_list = {
	.algs = aead_list,
	.entries = ARRAY_SIZE(aead_list),
	.type = CRYPTO_ALG_TYPE_AEAD,
	.mask = CRYPTO_ALG_TYPE_MASK,
};

static const struct xfrm_algo_list xfrm_aalg_list = {
	.algs = aalg_list,
	.entries = ARRAY_SIZE(aalg_list),
	.type = CRYPTO_ALG_TYPE_HASH,
	.mask = CRYPTO_ALG_TYPE_HASH_MASK,
};

static const struct xfrm_algo_list xfrm_ealg_list = {
	.algs = ealg_list,
	.entries = ARRAY_SIZE(ealg_list),
	.type = CRYPTO_ALG_TYPE_BLKCIPHER,
	.mask = CRYPTO_ALG_TYPE_BLKCIPHER_MASK,
};

static const struct xfrm_algo_list xfrm_calg_list = {
	.algs = calg_list,
	.entries = ARRAY_SIZE(calg_list),
	.type = CRYPTO_ALG_TYPE_COMPRESS,
	.mask = CRYPTO_ALG_TYPE_MASK,
};

static struct xfrm_algo_desc *xfrm_find_algo(
	const struct xfrm_algo_list *algo_list,
	int match(const struct xfrm_algo_desc *entry, const void *data),
	const void *data, int probe)
{
	struct xfrm_algo_desc *list = algo_list->algs;
	int i, status;

	for (i = 0; i < algo_list->entries; i++) {
		if (!match(list + i, data))
			continue;

		if (list[i].available)
			return &list[i];

		if (!probe)
			break;

		status = crypto_has_alg(list[i].name, algo_list->type,
					algo_list->mask);
		if (!status)
			break;

		list[i].available = status;
		return &list[i];
	}
	return NULL;
}

static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry,
			     const void *data)
{
	return entry->desc.sadb_alg_id == (unsigned long)data;
}

struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id)
{
	return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match,
			      (void *)(unsigned long)alg_id, 1);
}
EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid);

struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id)
{
	return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match,
			      (void *)(unsigned long)alg_id, 1);
}
EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid);

struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id)
{
	return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match,
			      (void *)(unsigned long)alg_id, 1);
}
EXPORT_SYMBOL_GPL(xfrm_calg_get_byid);

static int xfrm_alg_name_match(const struct xfrm_algo_desc *entry,
			       const void *data)
{
	const char *name = data;

	return name && (!strcmp(name, entry->name) ||
			(entry->compat && !strcmp(name, entry->compat)));
}

struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe)
{
	return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name,
			      probe);
}
EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname);

struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe)
{
	return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name,
			      probe);
}
EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname);

struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe)
{
	return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name,
			      probe);
}
EXPORT_SYMBOL_GPL(xfrm_calg_get_byname);

struct xfrm_aead_name {
	const char *name;
	int icvbits;
};

static int xfrm_aead_name_match(const struct xfrm_algo_desc *entry,
				const void *data)
{
	const struct xfrm_aead_name *aead = data;
	const char *name = aead->name;

	return aead->icvbits == entry->uinfo.aead.icv_truncbits && name &&
	       !strcmp(name, entry->name);
}

struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, int probe)
{
	struct xfrm_aead_name data = {
		.name = name,
		.icvbits = icv_len,
	};

	return xfrm_find_algo(&xfrm_aead_list, xfrm_aead_name_match, &data,
			      probe);
}
EXPORT_SYMBOL_GPL(xfrm_aead_get_byname);

struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx)
{
	if (idx >= aalg_entries())
		return NULL;

	return &aalg_list[idx];
}
EXPORT_SYMBOL_GPL(xfrm_aalg_get_byidx);

struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx)
{
	if (idx >= ealg_entries())
		return NULL;

	return &ealg_list[idx];
}
EXPORT_SYMBOL_GPL(xfrm_ealg_get_byidx);

/*
 * Probe for the availability of crypto algorithms, and set the available
 * flag for any algorithms found on the system.  This is typically called by
 * pfkey during userspace SA add, update or register.
 */
void xfrm_probe_algs(void)
{
	int i, status;

	BUG_ON(in_softirq());

	for (i = 0; i < aalg_entries(); i++) {
		status = crypto_has_ahash(aalg_list[i].name, 0, 0);
		if (aalg_list[i].available != status)
			aalg_list[i].available = status;
	}

	for (i = 0; i < ealg_entries(); i++) {
		status = crypto_has_skcipher(ealg_list[i].name, 0, 0);
		if (ealg_list[i].available != status)
			ealg_list[i].available = status;
	}

	for (i = 0; i < calg_entries(); i++) {
		status = crypto_has_comp(calg_list[i].name, 0,
					 CRYPTO_ALG_ASYNC);
		if (calg_list[i].available != status)
			calg_list[i].available = status;
	}
}
EXPORT_SYMBOL_GPL(xfrm_probe_algs);

int xfrm_count_pfkey_auth_supported(void)
{
	int i, n;

	for (i = 0, n = 0; i < aalg_entries(); i++)
		if (aalg_list[i].available && aalg_list[i].pfkey_supported)
			n++;
	return n;
}
EXPORT_SYMBOL_GPL(xfrm_count_pfkey_auth_supported);

int xfrm_count_pfkey_enc_supported(void)
{
	int i, n;

	for (i = 0, n = 0; i < ealg_entries(); i++)
		if (ealg_list[i].available && ealg_list[i].pfkey_supported)
			n++;
	return n;
}
EXPORT_SYMBOL_GPL(xfrm_count_pfkey_enc_supported);

MODULE_LICENSE("GPL");
Commit	Line	Data
a716c119	1	/*
1da177e4 LT	2	* xfrm algorithm interface
	3	*
	4	* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the Free
a716c119	8	* Software Foundation; either version 2 of the License, or (at your option)
1da177e4 LT	9	* any later version.
	10	*/
	11
17bc1970 HX	12	#include <crypto/hash.h>
17bc1970 HX	13	#include <crypto/skcipher.h>
1da177e4 LT	14	#include <linux/module.h>
	15	#include <linux/kernel.h>
	16	#include <linux/pfkeyv2.h>
	17	#include <linux/crypto.h>
b3b724f4	18	#include <linux/scatterlist.h>
1da177e4	19	#include <net/xfrm.h>
1da177e4 LT	20	#if defined(CONFIG_INET_ESP) \|\| defined(CONFIG_INET_ESP_MODULE) \|\| defined(CONFIG_INET6_ESP) \|\| defined(CONFIG_INET6_ESP_MODULE)
	21	#include <net/esp.h>
	22	#endif
1da177e4 LT	23
	24	/*
	25	* Algorithms supported by IPsec. These entries contain properties which
	26	* are used in key negotiation and xfrm processing, and are used to verify
	27	* that instantiated crypto transforms have correct parameters for IPsec
	28	* purposes.
	29	*/
1a6509d9 HX	30	static struct xfrm_algo_desc aead_list[] = {
	31	{
	32	.name = "rfc4106(gcm(aes))",
	33
	34	.uinfo = {
	35	.aead = {
de0ded77	36	.geniv = "seqiv",
1a6509d9 HX	37	.icv_truncbits = 64,
	38	}
	39	},
	40
7e50f84c JK	41	.pfkey_supported = 1,
7e50f84c JK	42
1a6509d9 HX	43	.desc = {
	44	.sadb_alg_id = SADB_X_EALG_AES_GCM_ICV8,
	45	.sadb_alg_ivlen = 8,
	46	.sadb_alg_minbits = 128,
	47	.sadb_alg_maxbits = 256
	48	}
	49	},
	50	{
	51	.name = "rfc4106(gcm(aes))",
	52
	53	.uinfo = {
	54	.aead = {
de0ded77	55	.geniv = "seqiv",
1a6509d9 HX	56	.icv_truncbits = 96,
	57	}
	58	},
	59
7e50f84c JK	60	.pfkey_supported = 1,
7e50f84c JK	61
1a6509d9 HX	62	.desc = {
	63	.sadb_alg_id = SADB_X_EALG_AES_GCM_ICV12,
	64	.sadb_alg_ivlen = 8,
	65	.sadb_alg_minbits = 128,
	66	.sadb_alg_maxbits = 256
	67	}
	68	},
	69	{
	70	.name = "rfc4106(gcm(aes))",
	71
	72	.uinfo = {
	73	.aead = {
de0ded77	74	.geniv = "seqiv",
1a6509d9 HX	75	.icv_truncbits = 128,
	76	}
	77	},
	78
7e50f84c JK	79	.pfkey_supported = 1,
7e50f84c JK	80
1a6509d9 HX	81	.desc = {
	82	.sadb_alg_id = SADB_X_EALG_AES_GCM_ICV16,
	83	.sadb_alg_ivlen = 8,
	84	.sadb_alg_minbits = 128,
	85	.sadb_alg_maxbits = 256
	86	}
	87	},
	88	{
	89	.name = "rfc4309(ccm(aes))",
	90
	91	.uinfo = {
	92	.aead = {
de0ded77	93	.geniv = "seqiv",
1a6509d9 HX	94	.icv_truncbits = 64,
	95	}
	96	},
	97
7e50f84c JK	98	.pfkey_supported = 1,
7e50f84c JK	99
1a6509d9 HX	100	.desc = {
	101	.sadb_alg_id = SADB_X_EALG_AES_CCM_ICV8,
	102	.sadb_alg_ivlen = 8,
	103	.sadb_alg_minbits = 128,
	104	.sadb_alg_maxbits = 256
	105	}
	106	},
	107	{
	108	.name = "rfc4309(ccm(aes))",
	109
	110	.uinfo = {
	111	.aead = {
de0ded77	112	.geniv = "seqiv",
1a6509d9 HX	113	.icv_truncbits = 96,
	114	}
	115	},
	116
7e50f84c JK	117	.pfkey_supported = 1,
7e50f84c JK	118
1a6509d9 HX	119	.desc = {
	120	.sadb_alg_id = SADB_X_EALG_AES_CCM_ICV12,
	121	.sadb_alg_ivlen = 8,
	122	.sadb_alg_minbits = 128,
	123	.sadb_alg_maxbits = 256
	124	}
	125	},
	126	{
	127	.name = "rfc4309(ccm(aes))",
	128
	129	.uinfo = {
	130	.aead = {
de0ded77	131	.geniv = "seqiv",
1a6509d9 HX	132	.icv_truncbits = 128,
	133	}
	134	},
	135
7e50f84c JK	136	.pfkey_supported = 1,
7e50f84c JK	137
1a6509d9 HX	138	.desc = {
	139	.sadb_alg_id = SADB_X_EALG_AES_CCM_ICV16,
	140	.sadb_alg_ivlen = 8,
	141	.sadb_alg_minbits = 128,
	142	.sadb_alg_maxbits = 256
	143	}
	144	},
73c89c15 TB	145	{
	146	.name = "rfc4543(gcm(aes))",
	147
	148	.uinfo = {
	149	.aead = {
165ecc63	150	.geniv = "seqiv",
73c89c15 TB	151	.icv_truncbits = 128,
	152	}
	153	},
	154
7e50f84c JK	155	.pfkey_supported = 1,
7e50f84c JK	156
73c89c15 TB	157	.desc = {
	158	.sadb_alg_id = SADB_X_EALG_NULL_AES_GMAC,
	159	.sadb_alg_ivlen = 8,
	160	.sadb_alg_minbits = 128,
	161	.sadb_alg_maxbits = 256
	162	}
	163	},
b08b6b77 MW	164	{
	165	.name = "rfc7539esp(chacha20,poly1305)",
	166
	167	.uinfo = {
	168	.aead = {
de0ded77	169	.geniv = "seqiv",
b08b6b77 MW	170	.icv_truncbits = 128,
	171	}
	172	},
	173
	174	.pfkey_supported = 0,
	175	},
1a6509d9 HX	176	};
1a6509d9 HX	177
1da177e4 LT	178	static struct xfrm_algo_desc aalg_list[] = {
1da177e4 LT	179	{
01a2202c	180	.name = "digest_null",
a716c119	181
1da177e4 LT	182	.uinfo = {
	183	.auth = {
	184	.icv_truncbits = 0,
	185	.icv_fullbits = 0,
	186	}
	187	},
a716c119	188
7e50f84c JK	189	.pfkey_supported = 1,
7e50f84c JK	190
1da177e4 LT	191	.desc = {
	192	.sadb_alg_id = SADB_X_AALG_NULL,
	193	.sadb_alg_ivlen = 0,
	194	.sadb_alg_minbits = 0,
	195	.sadb_alg_maxbits = 0
	196	}
	197	},
	198	{
07d4ee58 HX	199	.name = "hmac(md5)",
07d4ee58 HX	200	.compat = "md5",
1da177e4 LT	201
	202	.uinfo = {
	203	.auth = {
	204	.icv_truncbits = 96,
	205	.icv_fullbits = 128,
	206	}
	207	},
a716c119	208
7e50f84c JK	209	.pfkey_supported = 1,
7e50f84c JK	210
1da177e4 LT	211	.desc = {
	212	.sadb_alg_id = SADB_AALG_MD5HMAC,
	213	.sadb_alg_ivlen = 0,
	214	.sadb_alg_minbits = 128,
	215	.sadb_alg_maxbits = 128
	216	}
	217	},
	218	{
07d4ee58 HX	219	.name = "hmac(sha1)",
07d4ee58 HX	220	.compat = "sha1",
1da177e4 LT	221
	222	.uinfo = {
	223	.auth = {
	224	.icv_truncbits = 96,
	225	.icv_fullbits = 160,
	226	}
	227	},
	228
7e50f84c JK	229	.pfkey_supported = 1,
7e50f84c JK	230
1da177e4 LT	231	.desc = {
	232	.sadb_alg_id = SADB_AALG_SHA1HMAC,
	233	.sadb_alg_ivlen = 0,
	234	.sadb_alg_minbits = 160,
	235	.sadb_alg_maxbits = 160
	236	}
	237	},
	238	{
07d4ee58 HX	239	.name = "hmac(sha256)",
07d4ee58 HX	240	.compat = "sha256",
1da177e4 LT	241
	242	.uinfo = {
	243	.auth = {
	244	.icv_truncbits = 96,
	245	.icv_fullbits = 256,
	246	}
	247	},
	248
7e50f84c JK	249	.pfkey_supported = 1,
7e50f84c JK	250
1da177e4 LT	251	.desc = {
	252	.sadb_alg_id = SADB_X_AALG_SHA2_256HMAC,
	253	.sadb_alg_ivlen = 0,
	254	.sadb_alg_minbits = 256,
	255	.sadb_alg_maxbits = 256
	256	}
	257	},
bc74b0c8 MW	258	{
	259	.name = "hmac(sha384)",
	260
	261	.uinfo = {
	262	.auth = {
	263	.icv_truncbits = 192,
	264	.icv_fullbits = 384,
	265	}
	266	},
	267
7e50f84c JK	268	.pfkey_supported = 1,
7e50f84c JK	269
bc74b0c8 MW	270	.desc = {
	271	.sadb_alg_id = SADB_X_AALG_SHA2_384HMAC,
	272	.sadb_alg_ivlen = 0,
	273	.sadb_alg_minbits = 384,
	274	.sadb_alg_maxbits = 384
	275	}
	276	},
	277	{
	278	.name = "hmac(sha512)",
	279
	280	.uinfo = {
	281	.auth = {
	282	.icv_truncbits = 256,
	283	.icv_fullbits = 512,
	284	}
	285	},
	286
7e50f84c JK	287	.pfkey_supported = 1,
7e50f84c JK	288
bc74b0c8 MW	289	.desc = {
	290	.sadb_alg_id = SADB_X_AALG_SHA2_512HMAC,
	291	.sadb_alg_ivlen = 0,
	292	.sadb_alg_minbits = 512,
	293	.sadb_alg_maxbits = 512
	294	}
	295	},
1da177e4	296	{
a13366c6 AKR	297	.name = "hmac(rmd160)",
a13366c6 AKR	298	.compat = "rmd160",
1da177e4 LT	299
	300	.uinfo = {
	301	.auth = {
	302	.icv_truncbits = 96,
	303	.icv_fullbits = 160,
	304	}
	305	},
	306
7e50f84c JK	307	.pfkey_supported = 1,
7e50f84c JK	308
1da177e4 LT	309	.desc = {
	310	.sadb_alg_id = SADB_X_AALG_RIPEMD160HMAC,
	311	.sadb_alg_ivlen = 0,
	312	.sadb_alg_minbits = 160,
	313	.sadb_alg_maxbits = 160
	314	}
	315	},
7cf4c1a5 KM	316	{
	317	.name = "xcbc(aes)",
	318
	319	.uinfo = {
	320	.auth = {
	321	.icv_truncbits = 96,
	322	.icv_fullbits = 128,
	323	}
	324	},
	325
7e50f84c JK	326	.pfkey_supported = 1,
7e50f84c JK	327
7cf4c1a5 KM	328	.desc = {
	329	.sadb_alg_id = SADB_X_AALG_AES_XCBC_MAC,
	330	.sadb_alg_ivlen = 0,
	331	.sadb_alg_minbits = 128,
	332	.sadb_alg_maxbits = 128
	333	}
	334	},
d2049d85 JK	335	{
	336	/* rfc4494 */
	337	.name = "cmac(aes)",
	338
	339	.uinfo = {
	340	.auth = {
	341	.icv_truncbits = 96,
	342	.icv_fullbits = 128,
	343	}
	344	},
	345
	346	.pfkey_supported = 0,
	347	},
1da177e4 LT	348	};
	349
	350	static struct xfrm_algo_desc ealg_list[] = {
	351	{
6b7326c8 HX	352	.name = "ecb(cipher_null)",
6b7326c8 HX	353	.compat = "cipher_null",
a716c119	354
1da177e4 LT	355	.uinfo = {
	356	.encr = {
	357	.blockbits = 8,
	358	.defkeybits = 0,
	359	}
	360	},
a716c119	361
7e50f84c JK	362	.pfkey_supported = 1,
7e50f84c JK	363
1da177e4 LT	364	.desc = {
	365	.sadb_alg_id = SADB_EALG_NULL,
	366	.sadb_alg_ivlen = 0,
	367	.sadb_alg_minbits = 0,
	368	.sadb_alg_maxbits = 0
	369	}
	370	},
	371	{
6b7326c8 HX	372	.name = "cbc(des)",
6b7326c8 HX	373	.compat = "des",
1da177e4 LT	374
	375	.uinfo = {
	376	.encr = {
165ecc63	377	.geniv = "echainiv",
1da177e4 LT	378	.blockbits = 64,
	379	.defkeybits = 64,
	380	}
	381	},
	382
7e50f84c JK	383	.pfkey_supported = 1,
7e50f84c JK	384
1da177e4 LT	385	.desc = {
	386	.sadb_alg_id = SADB_EALG_DESCBC,
	387	.sadb_alg_ivlen = 8,
	388	.sadb_alg_minbits = 64,
	389	.sadb_alg_maxbits = 64
	390	}
	391	},
	392	{
6b7326c8 HX	393	.name = "cbc(des3_ede)",
6b7326c8 HX	394	.compat = "des3_ede",
1da177e4 LT	395
	396	.uinfo = {
	397	.encr = {
165ecc63	398	.geniv = "echainiv",
1da177e4 LT	399	.blockbits = 64,
	400	.defkeybits = 192,
	401	}
	402	},
	403
7e50f84c JK	404	.pfkey_supported = 1,
7e50f84c JK	405
1da177e4 LT	406	.desc = {
	407	.sadb_alg_id = SADB_EALG_3DESCBC,
	408	.sadb_alg_ivlen = 8,
	409	.sadb_alg_minbits = 192,
	410	.sadb_alg_maxbits = 192
	411	}
	412	},
	413	{
245acb87 HX	414	.name = "cbc(cast5)",
245acb87 HX	415	.compat = "cast5",
1da177e4 LT	416
	417	.uinfo = {
	418	.encr = {
165ecc63	419	.geniv = "echainiv",
1da177e4 LT	420	.blockbits = 64,
	421	.defkeybits = 128,
	422	}
	423	},
	424
7e50f84c JK	425	.pfkey_supported = 1,
7e50f84c JK	426
1da177e4 LT	427	.desc = {
	428	.sadb_alg_id = SADB_X_EALG_CASTCBC,
	429	.sadb_alg_ivlen = 8,
	430	.sadb_alg_minbits = 40,
	431	.sadb_alg_maxbits = 128
	432	}
	433	},
	434	{
6b7326c8 HX	435	.name = "cbc(blowfish)",
6b7326c8 HX	436	.compat = "blowfish",
1da177e4 LT	437
	438	.uinfo = {
	439	.encr = {
165ecc63	440	.geniv = "echainiv",
1da177e4 LT	441	.blockbits = 64,
	442	.defkeybits = 128,
	443	}
	444	},
	445
7e50f84c JK	446	.pfkey_supported = 1,
7e50f84c JK	447
1da177e4 LT	448	.desc = {
	449	.sadb_alg_id = SADB_X_EALG_BLOWFISHCBC,
	450	.sadb_alg_ivlen = 8,
	451	.sadb_alg_minbits = 40,
	452	.sadb_alg_maxbits = 448
	453	}
	454	},
	455	{
6b7326c8 HX	456	.name = "cbc(aes)",
6b7326c8 HX	457	.compat = "aes",
1da177e4 LT	458
	459	.uinfo = {
	460	.encr = {
165ecc63	461	.geniv = "echainiv",
1da177e4 LT	462	.blockbits = 128,
	463	.defkeybits = 128,
	464	}
	465	},
	466
7e50f84c JK	467	.pfkey_supported = 1,
7e50f84c JK	468
1da177e4 LT	469	.desc = {
	470	.sadb_alg_id = SADB_X_EALG_AESCBC,
	471	.sadb_alg_ivlen = 8,
	472	.sadb_alg_minbits = 128,
	473	.sadb_alg_maxbits = 256
	474	}
	475	},
	476	{
a716c119 YH	477	.name = "cbc(serpent)",
	478	.compat = "serpent",
	479
	480	.uinfo = {
	481	.encr = {
165ecc63	482	.geniv = "echainiv",
a716c119 YH	483	.blockbits = 128,
	484	.defkeybits = 128,
	485	}
	486	},
	487
7e50f84c JK	488	.pfkey_supported = 1,
7e50f84c JK	489
a716c119 YH	490	.desc = {
	491	.sadb_alg_id = SADB_X_EALG_SERPENTCBC,
	492	.sadb_alg_ivlen = 8,
	493	.sadb_alg_minbits = 128,
	494	.sadb_alg_maxbits = 256,
	495	}
1da177e4	496	},
6a0dc8d7 NT	497	{
6a0dc8d7 NT	498	.name = "cbc(camellia)",
138f3c85	499	.compat = "camellia",
6a0dc8d7 NT	500
	501	.uinfo = {
	502	.encr = {
165ecc63	503	.geniv = "echainiv",
6a0dc8d7 NT	504	.blockbits = 128,
	505	.defkeybits = 128,
	506	}
	507	},
	508
7e50f84c JK	509	.pfkey_supported = 1,
7e50f84c JK	510
6a0dc8d7 NT	511	.desc = {
	512	.sadb_alg_id = SADB_X_EALG_CAMELLIACBC,
	513	.sadb_alg_ivlen = 8,
	514	.sadb_alg_minbits = 128,
	515	.sadb_alg_maxbits = 256
	516	}
	517	},
1da177e4	518	{
a716c119 YH	519	.name = "cbc(twofish)",
	520	.compat = "twofish",
	521
	522	.uinfo = {
	523	.encr = {
165ecc63	524	.geniv = "echainiv",
a716c119 YH	525	.blockbits = 128,
	526	.defkeybits = 128,
	527	}
	528	},
	529
7e50f84c JK	530	.pfkey_supported = 1,
7e50f84c JK	531
a716c119 YH	532	.desc = {
	533	.sadb_alg_id = SADB_X_EALG_TWOFISHCBC,
	534	.sadb_alg_ivlen = 8,
	535	.sadb_alg_minbits = 128,
	536	.sadb_alg_maxbits = 256
	537	}
1da177e4	538	},
405137d1 JL	539	{
	540	.name = "rfc3686(ctr(aes))",
	541
	542	.uinfo = {
	543	.encr = {
165ecc63	544	.geniv = "seqiv",
405137d1 JL	545	.blockbits = 128,
	546	.defkeybits = 160, /* 128-bit key + 32-bit nonce */
	547	}
	548	},
	549
7e50f84c JK	550	.pfkey_supported = 1,
7e50f84c JK	551
405137d1 JL	552	.desc = {
	553	.sadb_alg_id = SADB_X_EALG_AESCTR,
	554	.sadb_alg_ivlen = 8,
4203223a TG	555	.sadb_alg_minbits = 160,
4203223a TG	556	.sadb_alg_maxbits = 288
405137d1 JL	557	}
405137d1 JL	558	},
1da177e4 LT	559	};
	560
	561	static struct xfrm_algo_desc calg_list[] = {
	562	{
	563	.name = "deflate",
	564	.uinfo = {
	565	.comp = {
	566	.threshold = 90,
	567	}
	568	},
7e50f84c	569	.pfkey_supported = 1,
1da177e4 LT	570	.desc = { .sadb_alg_id = SADB_X_CALG_DEFLATE }
	571	},
	572	{
	573	.name = "lzs",
	574	.uinfo = {
	575	.comp = {
	576	.threshold = 90,
	577	}
	578	},
7e50f84c	579	.pfkey_supported = 1,
1da177e4 LT	580	.desc = { .sadb_alg_id = SADB_X_CALG_LZS }
	581	},
	582	{
	583	.name = "lzjh",
	584	.uinfo = {
	585	.comp = {
	586	.threshold = 50,
	587	}
	588	},
7e50f84c	589	.pfkey_supported = 1,
1da177e4 LT	590	.desc = { .sadb_alg_id = SADB_X_CALG_LZJH }
	591	},
	592	};
	593
	594	static inline int aalg_entries(void)
	595	{
	596	return ARRAY_SIZE(aalg_list);
	597	}
	598
	599	static inline int ealg_entries(void)
	600	{
	601	return ARRAY_SIZE(ealg_list);
	602	}
	603
	604	static inline int calg_entries(void)
	605	{
	606	return ARRAY_SIZE(calg_list);
	607	}
	608
c92b3a2f HX	609	struct xfrm_algo_list {
	610	struct xfrm_algo_desc *algs;
	611	int entries;
	612	u32 type;
	613	u32 mask;
	614	};
1da177e4	615
1a6509d9 HX	616	static const struct xfrm_algo_list xfrm_aead_list = {
	617	.algs = aead_list,
	618	.entries = ARRAY_SIZE(aead_list),
	619	.type = CRYPTO_ALG_TYPE_AEAD,
	620	.mask = CRYPTO_ALG_TYPE_MASK,
	621	};
	622
c92b3a2f HX	623	static const struct xfrm_algo_list xfrm_aalg_list = {
	624	.algs = aalg_list,
	625	.entries = ARRAY_SIZE(aalg_list),
	626	.type = CRYPTO_ALG_TYPE_HASH,
6fbf2cb7	627	.mask = CRYPTO_ALG_TYPE_HASH_MASK,
c92b3a2f	628	};
1da177e4	629
c92b3a2f HX	630	static const struct xfrm_algo_list xfrm_ealg_list = {
	631	.algs = ealg_list,
	632	.entries = ARRAY_SIZE(ealg_list),
	633	.type = CRYPTO_ALG_TYPE_BLKCIPHER,
6fbf2cb7	634	.mask = CRYPTO_ALG_TYPE_BLKCIPHER_MASK,
c92b3a2f	635	};
1da177e4	636
c92b3a2f HX	637	static const struct xfrm_algo_list xfrm_calg_list = {
	638	.algs = calg_list,
	639	.entries = ARRAY_SIZE(calg_list),
	640	.type = CRYPTO_ALG_TYPE_COMPRESS,
6fbf2cb7	641	.mask = CRYPTO_ALG_TYPE_MASK,
c92b3a2f	642	};
1da177e4	643
c92b3a2f HX	644	static struct xfrm_algo_desc *xfrm_find_algo(
	645	const struct xfrm_algo_list *algo_list,
	646	int match(const struct xfrm_algo_desc entry, const void data),
	647	const void *data, int probe)
1da177e4	648	{
c92b3a2f	649	struct xfrm_algo_desc *list = algo_list->algs;
1da177e4 LT	650	int i, status;
1da177e4 LT	651
c92b3a2f HX	652	for (i = 0; i < algo_list->entries; i++) {
c92b3a2f HX	653	if (!match(list + i, data))
1da177e4 LT	654	continue;
	655
	656	if (list[i].available)
	657	return &list[i];
	658
	659	if (!probe)
	660	break;
	661
c92b3a2f HX	662	status = crypto_has_alg(list[i].name, algo_list->type,
c92b3a2f HX	663	algo_list->mask);
1da177e4 LT	664	if (!status)
	665	break;
	666
	667	list[i].available = status;
	668	return &list[i];
	669	}
	670	return NULL;
	671	}
	672
c92b3a2f HX	673	static int xfrm_alg_id_match(const struct xfrm_algo_desc *entry,
	674	const void *data)
	675	{
26b8e51e	676	return entry->desc.sadb_alg_id == (unsigned long)data;
c92b3a2f HX	677	}
	678
	679	struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id)
	680	{
	681	return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_id_match,
26b8e51e	682	(void *)(unsigned long)alg_id, 1);
c92b3a2f HX	683	}
	684	EXPORT_SYMBOL_GPL(xfrm_aalg_get_byid);
	685
	686	struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id)
	687	{
	688	return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_id_match,
26b8e51e	689	(void *)(unsigned long)alg_id, 1);
c92b3a2f HX	690	}
	691	EXPORT_SYMBOL_GPL(xfrm_ealg_get_byid);
	692
	693	struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id)
	694	{
	695	return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_id_match,
26b8e51e	696	(void *)(unsigned long)alg_id, 1);
c92b3a2f HX	697	}
	698	EXPORT_SYMBOL_GPL(xfrm_calg_get_byid);
	699
	700	static int xfrm_alg_name_match(const struct xfrm_algo_desc *entry,
	701	const void *data)
	702	{
	703	const char *name = data;
	704
	705	return name && (!strcmp(name, entry->name) \|\|
	706	(entry->compat && !strcmp(name, entry->compat)));
	707	}
	708
6f2f19ed	709	struct xfrm_algo_desc xfrm_aalg_get_byname(const char name, int probe)
1da177e4	710	{
c92b3a2f HX	711	return xfrm_find_algo(&xfrm_aalg_list, xfrm_alg_name_match, name,
c92b3a2f HX	712	probe);
1da177e4 LT	713	}
	714	EXPORT_SYMBOL_GPL(xfrm_aalg_get_byname);
	715
6f2f19ed	716	struct xfrm_algo_desc xfrm_ealg_get_byname(const char name, int probe)
1da177e4	717	{
c92b3a2f HX	718	return xfrm_find_algo(&xfrm_ealg_list, xfrm_alg_name_match, name,
c92b3a2f HX	719	probe);
1da177e4 LT	720	}
	721	EXPORT_SYMBOL_GPL(xfrm_ealg_get_byname);
	722
6f2f19ed	723	struct xfrm_algo_desc xfrm_calg_get_byname(const char name, int probe)
1da177e4	724	{
c92b3a2f HX	725	return xfrm_find_algo(&xfrm_calg_list, xfrm_alg_name_match, name,
c92b3a2f HX	726	probe);
1da177e4 LT	727	}
	728	EXPORT_SYMBOL_GPL(xfrm_calg_get_byname);
	729
1a6509d9 HX	730	struct xfrm_aead_name {
	731	const char *name;
	732	int icvbits;
	733	};
	734
	735	static int xfrm_aead_name_match(const struct xfrm_algo_desc *entry,
	736	const void *data)
	737	{
	738	const struct xfrm_aead_name *aead = data;
	739	const char *name = aead->name;
	740
	741	return aead->icvbits == entry->uinfo.aead.icv_truncbits && name &&
	742	!strcmp(name, entry->name);
	743	}
	744
6f2f19ed	745	struct xfrm_algo_desc xfrm_aead_get_byname(const char name, int icv_len, int probe)
1a6509d9 HX	746	{
	747	struct xfrm_aead_name data = {
	748	.name = name,
	749	.icvbits = icv_len,
	750	};
	751
	752	return xfrm_find_algo(&xfrm_aead_list, xfrm_aead_name_match, &data,
	753	probe);
	754	}
	755	EXPORT_SYMBOL_GPL(xfrm_aead_get_byname);
	756
1da177e4 LT	757	struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx)
	758	{
	759	if (idx >= aalg_entries())
	760	return NULL;
	761
	762	return &aalg_list[idx];
	763	}
	764	EXPORT_SYMBOL_GPL(xfrm_aalg_get_byidx);
	765
	766	struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx)
	767	{
	768	if (idx >= ealg_entries())
	769	return NULL;
	770
	771	return &ealg_list[idx];
	772	}
	773	EXPORT_SYMBOL_GPL(xfrm_ealg_get_byidx);
	774
	775	/*
	776	* Probe for the availability of crypto algorithms, and set the available
	777	* flag for any algorithms found on the system. This is typically called by
	778	* pfkey during userspace SA add, update or register.
	779	*/
	780	void xfrm_probe_algs(void)
	781	{
1da177e4	782	int i, status;
a716c119	783
1da177e4 LT	784	BUG_ON(in_softirq());
	785
	786	for (i = 0; i < aalg_entries(); i++) {
17bc1970	787	status = crypto_has_ahash(aalg_list[i].name, 0, 0);
1da177e4 LT	788	if (aalg_list[i].available != status)
	789	aalg_list[i].available = status;
	790	}
a716c119	791
1da177e4	792	for (i = 0; i < ealg_entries(); i++) {
17bc1970	793	status = crypto_has_skcipher(ealg_list[i].name, 0, 0);
1da177e4 LT	794	if (ealg_list[i].available != status)
	795	ealg_list[i].available = status;
	796	}
a716c119	797
1da177e4	798	for (i = 0; i < calg_entries(); i++) {
e4d5b79c HX	799	status = crypto_has_comp(calg_list[i].name, 0,
e4d5b79c HX	800	CRYPTO_ALG_ASYNC);
1da177e4 LT	801	if (calg_list[i].available != status)
	802	calg_list[i].available = status;
	803	}
1da177e4 LT	804	}
	805	EXPORT_SYMBOL_GPL(xfrm_probe_algs);
	806
7e50f84c	807	int xfrm_count_pfkey_auth_supported(void)
1da177e4 LT	808	{
	809	int i, n;
	810
	811	for (i = 0, n = 0; i < aalg_entries(); i++)
7e50f84c	812	if (aalg_list[i].available && aalg_list[i].pfkey_supported)
1da177e4 LT	813	n++;
	814	return n;
	815	}
7e50f84c	816	EXPORT_SYMBOL_GPL(xfrm_count_pfkey_auth_supported);
1da177e4	817
7e50f84c	818	int xfrm_count_pfkey_enc_supported(void)
1da177e4 LT	819	{
	820	int i, n;
	821
	822	for (i = 0, n = 0; i < ealg_entries(); i++)
7e50f84c	823	if (ealg_list[i].available && ealg_list[i].pfkey_supported)
1da177e4 LT	824	n++;
	825	return n;
	826	}
7e50f84c	827	EXPORT_SYMBOL_GPL(xfrm_count_pfkey_enc_supported);
1da177e4	828
7e152524	829	MODULE_LICENSE("GPL");